.left{
    box-sizing: border-box;
    // padding-left: 12rpx;
    position: fixed;
    float: left;
    width: 15%;
    height: 1000rpx;
    background: #fafafa;
    >.lefta{
        height: 100rpx;
        line-height: 100rpx;
        font-size: 30rpx;
        box-sizing: border-box;
    }
}
.right{
    padding: 10rpx;
    box-sizing: border-box;
    float: right;
    width: 80%;
    height: 100%;
    background: #eeeeee;
    .righta{
        font-size: 25rpx;
        height: 150rpx;
        display:flex;
        justify-content: space-between;
    }
}
#a{
    border-left: 3px solid red;
    background: white;
}